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25 lines
819 B
Python
25 lines
819 B
Python
#!/usr/bin/env python3
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"""Clear only a dead Darling server's stale PID marker before startup."""
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import os
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from pathlib import Path
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import time
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prefix = Path(os.environ.get('DPREFIX', str(Path.home() / '.darling')))
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marker = prefix / '.init.pid'
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try:
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pid = int(marker.read_text().strip())
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except (OSError, ValueError):
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raise SystemExit(0)
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if pid <= 0:
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raise SystemExit(0)
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status = Path('/proc') / str(pid) / 'status'
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try:
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state = next(line.split()[1] for line in status.read_text().splitlines() if line.startswith('State:'))
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dead = state == 'Z'
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except FileNotFoundError:
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dead = True
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except (OSError, StopIteration):
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dead = False
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if dead:
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os.replace(marker, prefix / f'.init.pid.stale-{pid}-{time.time_ns()}')
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print(f'Recovered stale Darling server marker for PID {pid}', flush=True)
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